Anyone with even a modicum of knowledge about climate history recognizes that the Arctic experiences substantial climate swings about every 60-70 years due to entirely natural ocean oscillation cycles.

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"There is other research out there pointing out that this storage may be part of a natural cycle that will eventually reverse, either due to El Nino or the so-called Atlantic Multidecadal Oscillation, and therefore may not imply what the authors are suggesting, " he said.

BBC: Science & Environment